"Consider a system of just two particles, with identical masses, orbiting in circles about their center of mass. SHow that the gravitational potential energy of this system is -2 times the total kinetic energy.(adsbygoogle = window.adsbygoogle || []).push({});

2. Relevant equations

KE = 1/2 mv^2

U(potential) = -2U(kinetic)

grav. potential =

U=-GMm-r

3. The attempt at a solution

we're supposed to set 1/2mv^2 to the rotational gravitational energy -- but I think i have the wrong equation and I don't know where to go from here....

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# Homework Help: Gravit. rotational energy related to KE

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